EP 0281371 A2 19880907 - Band-pass filter.
Title (en)
Band-pass filter.
Title (de)
Bandpassfilter.
Title (fr)
Filtre passe-bande.
Publication
Application
Priority
JP 4785087 A 19870304
Abstract (en)
A loop circuit of a band-pass filter is constituted by connecting two integrating circuits (4, 6; 8, 10 or 34, 36; 38, 40) each including a current source (4; 6 or 34; 38) and a capacitor (6; 10 or 36; 40) connected to an output terminal of thereof, so that an input terminal of one (4, 6; 34, 36) of the integrating circuits is connected to an output terminal of the other (8, 10; 38, 40) and an output terminal of one of the integrating circuits is connected to an input terminal of the other. At least two sets of the loop circuits (4 - 10; 34 - 40) are used, and these loop circuits are coupled by a capacitor (32). Two termination resistors (12; 42) are connected to an output terminal of a start loop circuit and an output terminal of an end loop circuit, respectively. A coupling capacitor (2) is connected to an input terminal of the start loop circuit (4 - 10), and an input signal is input to the start loop circuit (4 - 10) through the coupling capacitor (2). An output signal is output from an output terminal of the end loop circuit (34 - 40).
IPC 1-7
IPC 8 full level
H03H 11/04 (2006.01)
CPC (source: EP US)
H03H 11/04 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0281371 A2 19880907; EP 0281371 A3 19900207; JP 2664675 B2 19971015; JP S63215208 A 19880907; US 4884036 A 19891128
DOCDB simple family (application)
EP 88301799 A 19880302; JP 4785087 A 19870304; US 16384388 A 19880303